Weathercoat™
DSC432
High Performance Acrylic Weatherproofing Coatings
Description
The right choice for changing the color
of an existing EIFS finish or other
exterior surfaces. Weathercoat is an
exterior 100% acrylic smooth coating
which is offered in a variety of standard
colors as well as custom colors.
Weathercoat contains the most
effective ingredients available to help
resist mold and mildew growth.
Uses
Weathercoat is a durable coating
which may be used to protect and
decorate masonry, stucco, wood,
primed metal and acrylic-based
textured finishes such as EIFS
finishes.
Coverage
The coverage of Weathercoat on
textured surfaces will vary depending
upon type of texture, time of exposure,
climate, and elevation exposure and
conditions. The coverage of the first
coat on textured surfaces can vary
from 33-74 m2 (350-800 ft2) per pail
depending upon conditions. The
coverage of the second coat on
textured surfaces can vary between
42-93 m2 (450-1000 ft2) per pail
because the surface becomes more
sealed and smoother. For best
uniformity of appearance, two coats
are always recommended for recoating
finishes that have been exposed two
years or longer. Coverage will be
higher on smooth, primed surfaces. A
test section is recommended to
determine a more accurate coverage
rate.
Properties
Drying Time - Drying time of
Weathercoat is dependent on the air
temperature and relative humidity.
Under average drying conditions
[21 °C (70 °F), 55% R.H.].
Weathercoat is dry to the touch in 30
minutes and dry to handle or recoat in
2 hours. Protect work from rain for at
least 24 hours.
Water Vapor Transmission
(ASTM E96) - The Weathercoat
coating is permeable to water vapor.
Dryvit Systems Canada
129 Ringwood Drive
Stouffville, Ontario
Canada L4A 8A2
800-263-3308
www.dryvit.com
Printed in Canada R3:08-17-04
©Dryvit Systems Canada 1992
Accelerated Weathering
(ASTM G155) - 5000 hours. No
deleterious effects.
Mildew Resistance
(ASTM D3273) - Passes.
Application Procedure
Job Conditions - Air and surface
temperature for application of
Weathercoat must be 7 °C (45 °F) or
higher and must remain so for at least
12 hours.
Surface Preparation - Surfaces shall
be clean, dry, above 7 °C (45 °F) and
free of efflorescence, grease, oil, form
release agents and curing compounds.
On previously painted surfaces, all
loose, peeling and chalking paint must
be removed. If it is a glossed surface, it
must be removed by sanding.
Metal Surfaces - Must be primed with a
corrosion-resistant primer.
EIFS Finishes - Freshly applied
finishes must dry a minimum of 24
hours under average drying conditions.
Existing EIFS finishes should be
cleaned and flushed thoroughly with
clean water.
Concrete - Shall have cured a
minimum of 28 days prior to
application of Weathercoat. If form
release agents or curing compounds
are present on the concrete surface,
the surface shall be thoroughly washed
with muriatic acid and flushed to
remove residual acid.
Masonry - The masonry surface, with
joints struck flush, may be "skim
coated" with Primus® , Primus DM™
or Genesis® mixture to produce a
smooth, level surface.
Stucco - Weathercoat shall be applied
to the textured coat. If additives are
present in the stucco, a test patch shall
be made and bond strength checked
prior to application.
Mixing - Stir Weathercoat to a smooth,
homogeneous consistency. Avoid
introducing air into the coating.
Application - Weathercoat may be
applied by brush, roller or airless spray
equipment. When applying by roller, a
maximum 19 mm (3/4") nap polyester
or polyester blend with nylon or lamb’s
wool and with beveled ends and a
phenolic core is recommended.
A 460 mm (18") wide roller frame with
57 mm (2 1/4") inside diameter is also
recommended. Plan the work ahead
to make sure that proper staging is
provided to maintain a wet edge. Apply
Weathercoat in one continuous coat,
maintaining a wet edge as the
application proceeds to a natural
break. The roller cover must be kept
fully loaded as the application
proceeds. Do not stretch out the
application by rolling with a dry roller.
The last leveling roller strokes should
always be in the same direction. Do
not cut in around openings prior to
overall application but, rather, do the
cut-in work as the application
proceeds. A 100 mm (4") wide roller is
recommended for cutting in. Where
cutting in, the Weathercoat may be
thinned down with water to prevent
excessive buildup.
Application Tips - Application should
always be done by an experienced
professional painting contractor who
has a successful track record of
coating masonry or EIFS. Lightly
misting a surface with water ahead of
an application to cool it down can help
when application must be done under
adverse heat conditions. The surface
should not be saturated with water or
overly damp when Weathercoat is
applied. Some surfaces are much
more porous than others. Even
different elevations on the same
building can vary in suction; therefore,
it is difficult to get an even appearance
with one coat if the surface is porous.
When changing color, always use two
coats. To avoid an uneven application,
do not allow Weathercoat to dry on
roller covers.
Clean Up - Clean tools with water while
Weathercoat is still wet.
Maintenance - All Dryvit products are
designed to be virtually maintenance
free. However, as with all building
products, depending on location, some
cleaning may be required. See Dryvit
publication DSC152 on cleaning and
recoating.
Storage: Weathercoat must be stored
at 7 °C (45 °F) or above in tightly
sealed containers out of direct sunlight.
Information contained in this product sheet conforms to the
standard detail recommendations and specifications for the
installation of Dryvit Systems Canada products as of the date of
publication of this document and is presented in good faith. Dryvit
Systems Canada assumes no liability, expressed or implied, as to
the architecture, engineering or workmanship of any project. To
ensure that you are using the latest, most complete information,
contact Dryvit Systems Canada